Spectroscopic studies of three novae |
| |
| Authors: | V P Arkhipova M A Burlak V F Esipov |
| |
| Institution: | (1) Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119899, Russia |
| |
| Abstract: | We present our spectroscopic observations of the novae V1425, V1493, and V1494 Aql carried out with the 125-cm telescope at the Crimean Station of the Sternberg Astronomical Institute in the wavelength range 4000–11000 Å. We measured the emission-line intensities, determined the nova shell expansion velocities from the line profile FWHMs and components, and estimated the interstellar reddening from the first members of the Balmer series. The chemical composition of the nova shells is analyzed. Nitrogen and oxygen were found to be overabundant in V1425 and V1494 Aql; the helium abundance turned out to be normal in the two stars. |
| |
| Keywords: | novae spectroscopic studies shell chemical composition |
| 本文献已被 SpringerLink 等数据库收录！ |
|
